PERL_CALLCONV bool Perl_sv_derived_from(pTHX_ SV* sv, const char* name);
PERL_CALLCONV I32 Perl_sv_eq(pTHX_ SV* sv1, SV* sv2);
PERL_CALLCONV void Perl_sv_free(pTHX_ SV* sv);
+PERL_CALLCONV void Perl_sv_free2(pTHX_ SV* sv);
PERL_CALLCONV void Perl_sv_free_arenas(pTHX);
PERL_CALLCONV char* Perl_sv_gets(pTHX_ SV* sv, PerlIO* fp, I32 append);
PERL_CALLCONV char* Perl_sv_grow(pTHX_ SV* sv, STRLEN newlen);
PERL_CALLCONV void Perl_sv_copypv(pTHX_ SV* dsv, SV* ssv);
PERL_CALLCONV char* Perl_my_atof2(pTHX_ const char *s, NV* value);
PERL_CALLCONV int Perl_my_socketpair(int family, int type, int protocol, int fd[2]);
+#ifdef PERL_COPY_ON_WRITE
+PERL_CALLCONV SV* Perl_sv_setsv_cow(pTHX_ SV* dsv, SV* ssv);
+#endif
#if defined(USE_PERLIO) && !defined(USE_SFIO)
PERL_CALLCONV int Perl_PerlIO_close(pTHX_ PerlIO *);